Catch transaction before it being caught by transaction.commit_manually

gistfile1.py

def transact(func):
    """
    Usage:
    @transaction.commit_manually
    @transact
    def some_function(a, b):
        do_something()
    """
    def decorated(*args, **kwargs):
        try:
            func(*args, **kwargs)
        except Exception, e:
            print e
            transaction.rollback()
            sys.exit()
    return decorated